不確実ふかくじつ Common I-adj Noun English jmdict 1 adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) uncertain;unreliable;inauthentic;insecure ネット上の不確実な情報を鵜呑みにしてはならない。 You mustn't swallow unreliable information that's on the Web.
確実かくじつ Common I-adj Noun English jmdict 1 adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) certain;sure;definite;reliable;sound;solid;safe;secure これは遅いけど確実な方法だ。 This is a slow but certain way.